Data sheet Pressure switch KP -...

DKRCC.PD.CD0.E7.22 | 520H9777 | 1© Danfoss | DCS (jmn) | 2016.09

The KP pressure switches can be used as safety switches against too low a suction pressure and / or too high a discharge pressure in refrigeration and air conditioning systems. They can also be used to start / stop compressors and fans for air-cooled condensers.They are available in both single and dual versions and include a single pole double throw (SPDT) switch.

Features • Ultra-short bounce time thanks to snap-action function (reduces wear to a minimum and increases reliability)

• Available with gold-plated contacts• SPDT switch design

Offers open or close switching action on pressure rise or fall

• Fail safe double bellows Prevent refrigerant loss and system contamination - standard on KP 7 and KP 17 pressure switches

• Convenient manual trip feature To test electrical contact function - no tools needed

• Pressure wire connectors For easy electrical wiring

• No spade or lug terminals required• Integral 1⁄2 NPSM swivel cable connector

Allows direct attachment of 1⁄2 in male pipe thread connector

• Lockplate Prevents tampering with range and differential settings

• Universal mounting hole patterns

Data sheet

Pressure switch KP

UL listed for USA and Canada, file E31024Approvals

Data sheet | Pressure switch, type KP


Technical data

Cable entry Integral 1⁄2 in female NPSM swivel cable connector allows direct attachment of 1⁄2 in male pipe thread connector.

Enclosure ~NEMA 1 This grade of enclosure is obtained when the units without top cover are mounted on a flat surface or bracket. The bracket must be fixed to the unit so that all unused holes are covered. ~ NEMA 2 This grade of enclosure is obtained when the units with top cover are mounted on a flat surface or bracket. The bracket must be fixed to the unit so that all unused holes are covered.

Control type Material

KP 1, KP 2, KP 5, KP 7, KP 15, KP 17, KP 25

Tin bronze, no. CW452K, EN 1652Nickel plated free cutting steel, no. 1.0737 / 1.0718 to EN 10277

KP with cap. tube Copper SF-Cu, no. 2.0090 to DIN 1787

Ambient temperature -40 – 149 °F (175 °F for maximum 2 hours)

Maximum working pressureLP: MWP = 245 psig

HP: MWP = 465 psig

Maximum test pressureLP: pe = 285 psig

HP: pe = 510 psig

Switch Single pole changeover switch (SPDT)

Contact load

120 V A.C.: 16 FLA, 96 LRA

240 V A.C.: 8 FLA, 48 LRA

240 V D.C.: 12 W pilot duty

Terminal D, dual switches 240 V, 50 VA

Materials in contact with the medium



Load

Signal option

Bellows movement on pressure rise

Bellows movement on pressure drop

Low or high pressure

Dual (low and high) pressure,LP signal

Dual (low and high) pressure,LP and HP signal

Low pressure, LP: KP 1 and KP 2 High pressure, HP: KP 5, KP 7W and KP 7B

Dual (low and high) pressure:KP 15, KP 17W, KP 17B and KP 25

Dual (low and high) pressure:KP 15, KP 17W, KP 17B and KP 25

Technical data Electrical wiring

Metric conversions 1 psi = 0.07 bar 5⁄9 (t1 °F - 32) = t2 °C

4 2 1 4 2 1

Danfoss

A60-1032.10

LP - signal option LP - signal option

SPDT - signal pole double throw

Pressure / Temperature

Rise

LoadCut-in

(term.1-4)

LoadCut-out

(term.1-4)

LoadCut-out

(term.1-2)

LoadCut-in

(term.1-2)or or

Drop

HP - signal option

Wring instruction

A21

13

A21

15

Line

Line Line

Line

Load Load



Ordering

Pressure Type

Low pressure (LP) High pressure (HP) Reset

Contact functio

Code no.

connectionRegulating

range Differential

∆p Regulating

range Differential

∆p Low

pressure High

pressure1⁄4 in flare

Cap. tube w. 1⁄4 in

flare nut 36 in[inHg][psig] [psi] [psig] [psi] [LP] [HP]

Low KP 1 6 in – 108 10 – 58 – – Auto – SPDT 060-200166 –

Low KP 1 6 in – 108 10 – 58 – – Auto – SPDT – 060-205166

Low KP 1 27 in – 100 10 – – Man. (Min.) – SPDT – 060-205266 1)

Low KP 2 6 in – 50 6 – 32 – – Auto – SPDT 060-201366 –

Low KP 2 6 in – 50 6 – 32 – – Auto – SPDT – 060-206366

High KP 5 – – 115 – 465 25 – 85 – Auto SPDT 060-201466 –

High KP 5 – – 115 – 465 25 – 85 – Auto SPDT – 060-206466

High KP 7W 2) – – 115 – 465 58 – 140 – Auto SPDT 060-200366 –

High KP 7W 2) – – 115 – 465 58 – 140 – Auto SPDT – 060-205366

High KP7B 2) – – 115 – 465 58 – Man. (Max.) SPDT 060-200466 –

High KP7B 2) – – 115 – 465 58 – Man. (Max.) SPDT – 060-205466

Dual KP 15 6 in – 108 10 – 58 115 – 465 58 Auto Auto SPDT/w. L P signal 060-200866 –

Dual KP 15 6 in – 108 10 – 58 115 – 465 58 Auto Auto SPDT/w. L P signal – 060-205866

Dual KP 15 6 in – 108 10 – 58 115 – 465 58 Auto Man. (Max.) SPDT/w. L P signal – 060-205966

Dual KP 15 6 in – 108 10 – 58 115 – 465 58 Man. (Min.) Man. (Max.) SPDT/w. L P signal – 060-206066

Dual KP 15 6 in – 108 10 – 58 115 – 465 58 Auto AutoSPDT/w. LP + HP

signal– 060-203166

Dual KP 15 6 in – 108 10 – 58 115 – 465 58 Auto Man. (Max.)SPDT/w. LP + HP

signal060-202666 –

Dual KP 17W 2) 6 in – 108 10 – 58 115 – 465 58 Auto AutoSPDT/w. LP + HP

signal– 060-202966

Dual KP 17W 2) 6 in – 108 10 – 58 115 – 465 58 Auto Auto SPDT/w LP signal – 060-205566

1) With dial knob 2) With fail safe double bellows

Metric conversions 1 psi = 0.07 bar 5⁄9 (t1 °F - 32) = t2 °C

For HCFC and non-flammable HFC refrigerants



FW

FW

FW

Design Pressure switch, type KP KP 1, KP 2, KP 5

KP 15, KP 25 flareKP 1, KP 2, KP 5, KP 15, KP 25, KP 7W, KP 7B, KP 17W, capillary tube

The switch in the KP has a snap-action function where the bellows move only when the cut-in or cut-out value is reached.

The bellows are connected to the low or high pressure side of the system through connection (10) or (11).

The design of the KP gives the following advantages: − high contact load − ultra-short bounce time − high resistance to pulsation − vibration resistance up to 4 g in the range 0 – 1000 Hz − long mechanical and electrical life

1. Low pressure setting spindle, (LP)

2. Differential setting spindle

3. Main arm 5. High pressure setting

spindle, (HP) 7. Main spring 8. Differential spring 9. Bellows10. LP connection11. HP connection12. Switch13. Terminals14. Earth terminal15. Cable entry16. Tumbler18. Locking plate19. Arm30. Reset button



Design (continued)

The KP with designations W or B have been tested and approved by TÜV (Germany) in accordance with EN 12263.

Versions with designation W will cut in automatically when the pressure has fallen to the setpoint minus the differential.

Versions with designation B can be cut in manually using the external reset button when:

KP 1 – the pressure has increased to 10 psi above the setpoint.

KP 7 – the pressure has fallen 58 psi below the setpoint.

KP 7 and KP 17 are equipped with fail-safe double bellows; a regulation bellows and an outer bellows. The double bellows system protects against loss of system charge in the event of a bellows rupture.

A rupture in the outer bellows will cause the control to trip approximately 43 psi lower than the actual control setting. This features provides a warning without a loss of charge.

All KP pressure switches, including those which are PED-approved, operate independently of changes in the ambient temperature around the control housing. Therefore the set cut-out pressure and differential are kept constant provided the permissible ambient temperatures are not exceeded.

1. Pressure setting spindle, (LP)

2.Differential setting spindle 3. Main arm 5. Pressure setting

spindle, (HP)15.Cable entry18.Locking plate

KP 7W (KP 7B), flare

KP 17W (KP 17B), flare

KP 7W (KP 7B), capillary tube



Terminology Reset1. Manual reset:

Units with manual reset can only be reset during operation by activation of the reset button.

2. Automatic reset: After operational stop, these units reset automatically.

Maximum working pressureThe Maximum working pressure is determined by the pressure that can be safely allowed in the refrigerating system or any of the units within it. The maximum working pressure is designated MWP.

Test pressureThe test pressure is the pressure used in strength tests and / or leakage tests on refrigerating systems or individual parts in systems. The test pressure is designated Pe.

“Snap function”A certain contact force is maintained until irrevocable “snap” is initiated. The time during which the contact force approaches zero is thus limited to a very few milliseconds. Therefore contact bounce cannot occur as a result of, for example, slight vibrations, before the cut-out point. Contact systems with “Snap function” will change over even when micro-welds are created between the contacts during cut-in. A very high force is created during cut-out to separate the contacts. This force immediately shears off all the welds. Thus the cut-out point of the unit remains very accurate and completely independent of the magnitude of the current load.

Setting Pressure switches with automatic reset – LP: Set the LP start pressure on the “CUT-IN” scale (range scale). One rotation of the low pressure spindle ~10 psi. Set the LP differential on the “DIFF” scale. One rotation of the differential spindle ~ 3 psi. The LP cut-out pressure is the LP cut-in pressure minus the differential.

Note: The LP cut-out pressure must be above absolute vacuum pe = 30 in Hg. If compressor will not stop at low cut-out pressure, check whether the differential value is set at too high a value!

Pressure switches with automatic reset – HP: Set the HP cut-out pressure on the “CUT-OUT” scale. One rotation of the HP spindle ~ 33 psi. Set the HP differential on the “DIFF” scale. One rotation of the differential spindle ~ 4 psi. The HP cut-in pressure is the HP cut-out pressure minus the differential. Pressure switches with manual reset. Set the cut-out pressure on “CUT-OUT” scale (range scale). Low pressure controls can be manually reset when the pressure is equal to the cut-out pressure plus the differential.

High pressure switches can be manually reset when the pressure is equal to the cut-out pressure minus the differential.

Cut-in and cut-out pressures for both the LP and HP sides of the system should always be checked with an accurate pressure gauge.Metric conversions

1 psi = 0.07 bar



Danfoss

60-950.13

Danfoss

60-991.14

Danfoss

60-1014.12

Danfoss

60-760.13

Danfoss

60-908.11

Danfoss

60-1015.14

Dimensions [in] and weight [lb]

Metric conversions1 in = 25.5 mm1 lb = 0.454 kg

KP 1, KP 2 and KP 5 KP 15 and KP 25

KP 7W and KP 7B KP 17W and KP 17B

KP 1, KP 2, KP 5, KP 7W and KP 7B

Net weight: KP 1, KP 2, KP 5 and KP 7: approx. 0.7 lbs. KP 15, KP 17 and KP 25: approx. 1.1lbs.

Flare connection

Capillary tube connection

KP 15, KP 17W, KP 17B and KP 25



Danfoss

60-1023.14

Danfoss

60-1024.14

Danfoss

60-1011.13

Danfoss

60-1011.13

KP single switches, rear side

Wall bracket Angle bracket

KP dual switches, rear side

Dimensions [in]

Danfoss can accept no responsibility for possible errors in catalogues, brochures and other printed material. Danfoss reserves the right to alter its products without notice. This also applies to products already on order provided that such alterations can be made without subsequential changes being necessary in speci�cations already agreed.All trademarks in this material are property of the respective companies. Danfoss and the Danfoss logotype are trademarks of Danfoss A/S. All rights reserved.


Data sheet Pressure switch KP -...

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